Cochran Quizziz 2 Genetics

Two identical alleles for a trait is known as

• homozygous

• heterozygous

• mutation

• codominance

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A physical appearance is

• genotype

• heterozygous

• phenotype

• codominance

A mutation is harmful to an organism if it

• changes the phenotype of an organism

• changes the DNA segment

• reduces the organism's chance of survival

• makes the organism better able to avoid predators

What does Pp mean?

• two dominant alleles

• heterozygous alleles

• one dominant allele

• two dominant and recessive alleles

Who studied different characteristics of pea plants by cross-pollinating plants?

• Gregor Mendel

• Albert Punnett

• Sir Isaac Newton

• David Kuster

What is the probability of producing a tall pea plant from a cross between two hybrid tall pea plants?

• 25%

• 50%

• 75%

• 100%

What does a Punnett Square determine?

• all of Mendel's discoveries about genetic crosses

• all the outcomes of a genetic cross

• only the recessive allele combinations

• only the dominant allele combinations

Genotype is

• stem height

• feather color

• physical appearance

• genetic makeup

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The term that relates to physical characteristics that are studied in genetics.

• traits

• offspring

• generations

• hybrids

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Factors that control traits are

• purebreds

• genes

• recessives

• parents

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